Ratzel, Friedrich <br/><br/>
History of mankind. 

 - Delhi :  Radha Publications,        1989. 
 - xiv,562p. 
 -  Volume 2 .
<br/><br/><label>ISBN: </label>8171580866 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Y:1.1'M  C4.2